1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24 /* <DESC>
25 * Shows HTTPS usage with client certs and optional ssl engine use.
26 * </DESC>
27 */
28 #include <assert.h>
29 #include <ctype.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33
34 #include <curl/curl.h>
35
36 /*
37 * An SSL-enabled libcurl is required for this sample to work (at least one
38 * SSL backend has to be configured).
39 *
40 * **** This example only works with libcurl 7.56.0 and later! ****
41 */
42
main(int argc,char ** argv)43 int main(int argc, char **argv)
44 {
45 const char *name = argc > 1 ? argv[1] : "openssl";
46 CURLsslset result;
47
48 if(!strcmp("list", name)) {
49 const curl_ssl_backend **list;
50 int i;
51
52 result = curl_global_sslset(CURLSSLBACKEND_NONE, NULL, &list);
53 assert(result == CURLSSLSET_UNKNOWN_BACKEND);
54
55 for(i = 0; list[i]; i++)
56 printf("SSL backend #%d: '%s' (ID: %d)\n",
57 i, list[i]->name, list[i]->id);
58
59 return 0;
60 }
61 else if(isdigit((int)(unsigned char)*name)) {
62 int id = atoi(name);
63
64 result = curl_global_sslset((curl_sslbackend)id, NULL, NULL);
65 }
66 else
67 result = curl_global_sslset(CURLSSLBACKEND_NONE, name, NULL);
68
69 if(result == CURLSSLSET_UNKNOWN_BACKEND) {
70 fprintf(stderr, "Unknown SSL backend id: %s\n", name);
71 return 1;
72 }
73
74 assert(result == CURLSSLSET_OK);
75
76 printf("Version with SSL backend '%s':\n\n\t%s\n", name, curl_version());
77
78 return 0;
79 }
80